SIMILARITIES
- The main character (MC) who grew up a commoner at first is a fill in for the king, as per the king's request
- MC ends up needing to become the king when the real one *spoiler* inevitably dies to prevent political upheaval and many deaths
- There's a romance plot line
- Both dramas have good acting and cinematography

DIFFERENCES
- In TKA the king and MC are twins, in TCC they're just look a-likes
- TKA follows a female MC and in TCC it's a male MC

- Jung So Min is the main girl in both of them
- Both main guys are somehow related to real estate (In MMH he's a real estate mogul, while in BTIMFL he just owns a home)
- Main girl is jealous they own a home in both dramas, and ends up renting from them
- Both main guys are stingy (MMH because he worked hard to get his money and in BTIMFL because he owes money on the mortgage of the house)
- Both main guys have more standoff-ish personalities
- Both are lighthearted romance dramas